Web Development Beginner

What is JSON?

JavaScript Object Notation — a lightweight data interchange format that is easy for humans to read and machines to parse.

JSON represents structured data using key-value pairs and arrays. It supports strings, numbers, booleans, null, objects ({}), and arrays ([]). Example: {"name": "John", "age": 30, "hobbies": ["coding", "reading"]}.

JSON is the dominant format for web APIs, configuration files, and data storage. It is language-independent and supported by virtually every programming language. Related formats include YAML (more readable) and TOML (for configuration).

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SPA (Single Page Application)

A web application that loads a single HTML page and dynamically updates content without full page reloads.

REST (Representational State Transfer)

An architectural style for designing networked applications using standard HTTP methods and stateless communication.

A technique that delays loading non-critical resources until they are needed, improving initial page load performance.

A query language for APIs that lets clients request exactly the data they need, reducing over-fetching and under-fetching.

An automatic OPTIONS request sent by browsers before certain cross-origin requests to check if the actual request is permitted.

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